The A779 is a short A-road in West Lothian which came into existence following completion of junction 3a of the M8, which provided access into Livingston from the west. The road is built upon the general line, albeit much straightened, of the former B708, which ceased to exist after World War II.
Starting at the roundabout which provides access to the eastbound motorway slip roads, the A779 heads west. At the next roundabout it meets the A7066 and A89 and turns sharply left, crossing over the motorway. The next roundabout serves the westbound slip roads to the M8, after which the road runs through reclaimed industrial land, with the usual out-of-town offices and warehouses, to reach the edge of Livingston. Turning right at the next roundabout, the road soon ends on the A705 at yet another roundabout.